Choose the best answer to each of the following. Explain your reasoning. What do we mean by the halo of galaxy? (a) It is the central region that is crowded with stars. (b) It is a large, roughly spherical region surrounding the disk. (c) It is the pancake-shaped region in which spiral arms are found.

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Answer 1

Textbook Question

Chapter 11, Problem 1QQ

Choose the best answer to each of the following. Explain your reasoning.

What do we mean by the halo of galaxy? (a) It is the central region that is crowded with stars. (b) It is a large, roughly spherical region surrounding the disk. (c) It is the pancake-shaped region in which spiral arms are found.

Expert Solution & Answer

To determine

To Choose:

The correct option.

Answer to Problem 1QQ

The option (b) is the correct answer.

Explanation of Solution

Introduction:

Galaxies can be classified on the basis of shapes and into three main categories: Spiral, Elliptical and Irregular. Spiral galaxies have three main parts: bulge, halo and disk. Bulge is present in center. It contains old stars mostly. The disk contains young stars and forms the arms of the galaxy.

Halo is a loose structure that surrounds the bulge and some parts of disk. The old star clusters or the globular clusters lie in the halo part of the spiral galaxy.It is not the dominant region which is crowded with starsand is called the galactic central region. It is also not like a pancake region. Hence, both options a and c are not right.

Conclusion:

Therefore,a halo of the galaxy is a large, roughly spherical region surrounding the disk.

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4.) The diagram shows the electric field lines of a positively charged conducting sphere of radius R and charge Q. A B Points A and B are located on the same field line. A proton is placed at A and released from rest. The magnitude of the work done by the electric field in moving the proton from A to B is 1.7×10-16 J. Point A is at a distance of 5.0×10-2m from the centre of the sphere. Point B is at a distance of 1.0×10-1 m from the centre of the sphere. (a) Explain why the electric potential decreases from A to B. [2] (b) Draw, on the axes, the variation of electric potential V with distance r from the centre of the sphere. R [2] (c(i)) Calculate the electric potential difference between points A and B. [1] (c(ii)) Determine the charge Q of the sphere. [2] (d) The concept of potential is also used in the context of gravitational fields. Suggest why scientists developed a common terminology to describe different types of fields. [1]

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Answer 2

Textbook Question

Chapter 11, Problem 1QQ

Choose the best answer to each of the following. Explain your reasoning.

What do we mean by the halo of galaxy? (a) It is the central region that is crowded with stars. (b) It is a large, roughly spherical region surrounding the disk. (c) It is the pancake-shaped region in which spiral arms are found.

Expert Solution & Answer

To determine

To Choose:

The correct option.

Answer to Problem 1QQ

The option (b) is the correct answer.

Explanation of Solution

Introduction:

Galaxies can be classified on the basis of shapes and into three main categories: Spiral, Elliptical and Irregular. Spiral galaxies have three main parts: bulge, halo and disk. Bulge is present in center. It contains old stars mostly. The disk contains young stars and forms the arms of the galaxy.

Halo is a loose structure that surrounds the bulge and some parts of disk. The old star clusters or the globular clusters lie in the halo part of the spiral galaxy.It is not the dominant region which is crowded with starsand is called the galactic central region. It is also not like a pancake region. Hence, both options a and c are not right.

Conclusion:

Therefore,a halo of the galaxy is a large, roughly spherical region surrounding the disk.

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Answer 3

Textbook Question

Chapter 11, Problem 1QQ

Choose the best answer to each of the following. Explain your reasoning.

What do we mean by the halo of galaxy? (a) It is the central region that is crowded with stars. (b) It is a large, roughly spherical region surrounding the disk. (c) It is the pancake-shaped region in which spiral arms are found.

Expert Solution & Answer

To determine

To Choose:

The correct option.

Answer to Problem 1QQ

The option (b) is the correct answer.

Explanation of Solution

Introduction:

Galaxies can be classified on the basis of shapes and into three main categories: Spiral, Elliptical and Irregular. Spiral galaxies have three main parts: bulge, halo and disk. Bulge is present in center. It contains old stars mostly. The disk contains young stars and forms the arms of the galaxy.

Halo is a loose structure that surrounds the bulge and some parts of disk. The old star clusters or the globular clusters lie in the halo part of the spiral galaxy.It is not the dominant region which is crowded with starsand is called the galactic central region. It is also not like a pancake region. Hence, both options a and c are not right.

Conclusion:

Therefore,a halo of the galaxy is a large, roughly spherical region surrounding the disk.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 4

Textbook Question

Chapter 11, Problem 1QQ

Choose the best answer to each of the following. Explain your reasoning.

What do we mean by the halo of galaxy? (a) It is the central region that is crowded with stars. (b) It is a large, roughly spherical region surrounding the disk. (c) It is the pancake-shaped region in which spiral arms are found.

Expert Solution & Answer

To determine

To Choose:

The correct option.

Answer to Problem 1QQ

The option (b) is the correct answer.

Explanation of Solution

Introduction:

Galaxies can be classified on the basis of shapes and into three main categories: Spiral, Elliptical and Irregular. Spiral galaxies have three main parts: bulge, halo and disk. Bulge is present in center. It contains old stars mostly. The disk contains young stars and forms the arms of the galaxy.

Halo is a loose structure that surrounds the bulge and some parts of disk. The old star clusters or the globular clusters lie in the halo part of the spiral galaxy.It is not the dominant region which is crowded with starsand is called the galactic central region. It is also not like a pancake region. Hence, both options a and c are not right.

Conclusion:

Therefore,a halo of the galaxy is a large, roughly spherical region surrounding the disk.

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Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!

Answer 5

Textbook Question

Answer 6

Textbook Question

Answer 7

Expert Solution & Answer

To determine

To Choose:

The correct option.

Answer to Problem 1QQ

The option (b) is the correct answer.

Explanation of Solution

Introduction:

Galaxies can be classified on the basis of shapes and into three main categories: Spiral, Elliptical and Irregular. Spiral galaxies have three main parts: bulge, halo and disk. Bulge is present in center. It contains old stars mostly. The disk contains young stars and forms the arms of the galaxy.

Halo is a loose structure that surrounds the bulge and some parts of disk. The old star clusters or the globular clusters lie in the halo part of the spiral galaxy.It is not the dominant region which is crowded with starsand is called the galactic central region. It is also not like a pancake region. Hence, both options a and c are not right.

Conclusion:

Therefore,a halo of the galaxy is a large, roughly spherical region surrounding the disk.

Answer 8

Expert Solution & Answer

To determine

To Choose:

The correct option.

Answer to Problem 1QQ

The option (b) is the correct answer.

Explanation of Solution

Introduction:

Galaxies can be classified on the basis of shapes and into three main categories: Spiral, Elliptical and Irregular. Spiral galaxies have three main parts: bulge, halo and disk. Bulge is present in center. It contains old stars mostly. The disk contains young stars and forms the arms of the galaxy.

Halo is a loose structure that surrounds the bulge and some parts of disk. The old star clusters or the globular clusters lie in the halo part of the spiral galaxy.It is not the dominant region which is crowded with starsand is called the galactic central region. It is also not like a pancake region. Hence, both options a and c are not right.

Conclusion:

Therefore,a halo of the galaxy is a large, roughly spherical region surrounding the disk.

Answer 9

Expert Solution & Answer

Answer 10

Expert Solution & Answer

Answer 11

To determine

To Choose:

The correct option.

Answer 12

Answer to Problem 1QQ

The option (b) is the correct answer.

Answer 13

Explanation of Solution

Introduction:

Galaxies can be classified on the basis of shapes and into three main categories: Spiral, Elliptical and Irregular. Spiral galaxies have three main parts: bulge, halo and disk. Bulge is present in center. It contains old stars mostly. The disk contains young stars and forms the arms of the galaxy.

Halo is a loose structure that surrounds the bulge and some parts of disk. The old star clusters or the globular clusters lie in the halo part of the spiral galaxy.It is not the dominant region which is crowded with starsand is called the galactic central region. It is also not like a pancake region. Hence, both options a and c are not right.

Conclusion:

Therefore,a halo of the galaxy is a large, roughly spherical region surrounding the disk.